refactor: remove zen mode from the app (#3337)

* refactor: remove zen mode from settings

* refactor: remove zen mode from footer and options

packages/hoppscotch-common/src/layouts/default.vue

@@ -1,7 +1,7 @@
 <template>
   <div class="flex w-screen h-screen">
     <Splitpanes class="no-splitter" :dbl-click-splitter="false" horizontal>
-      <Pane v-if="!zenMode" style="height: auto">
+      <Pane style="height: auto">
         <AppHeader />
       </Pane>
       <Pane :class="spacerClass" class="flex flex-1 !overflow-auto md:mb-0">
@@ -81,7 +81,6 @@ const showSupport = ref(false)
 
 const fontSize = useSetting("FONT_SIZE")
 const expandNavigation = useSetting("EXPAND_NAVIGATION")
-const zenMode = useSetting("ZEN_MODE")
 const rightSidebar = useSetting("SIDEBAR")
 const columnLayout = useSetting("COLUMN_LAYOUT")